Twist Bioscience officer proposes $57.6K share sale

The shares were acquired through compensation-related vesting, and the proposed sale includes an amount to cover a related tax obligation.

Available on EDGAR 09/21/2026 - 04:54 PM EDT Accepted by SEC EDGAR 09/21/2026 - 04:52 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Twist Bioscience Corp (TWST) officer Dennis H. Cho reported a proposed sale of 348 common shares, with an aggregate market value of $57,591.01 and an approximate sale date of September 21, 2026. The shares were acquired through restricted stock vesting on September 18, 2026, as compensation. The sale includes an amount necessary to cover a tax obligation resulting from settlement of a vested equity award distribution. Prior reported sales include 14,205 shares on June 24, August 5, and August 19, 2026.

Key Figures

Proposed sale: 348 shares Aggregate market value: $57,591.01 Shares acquired through restricted stock vesting: 348 shares +2 more

5 metrics

Proposed sale 348 shares Common shares; approximate sale date September 21, 2026

Aggregate market value $57,591.01 Proposed sale of 348 common shares

Shares acquired through restricted stock vesting 348 shares September 18, 2026; compensation

Prior sale 14,205 shares June 24, 2026

Gross proceeds $1,274,898.75 Prior sale on June 24, 2026

Key Terms

Restricted Stock Vesting, Aggregate Market Value, vested equity award distribution

3 terms

Restricted Stock Vesting financial

"Nature of Acquisition Transaction: Restricted Stock Vesting"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

Aggregate Market Value financial

"Aggregate Market Value"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

vested equity award distribution financial

"settlement of a vested equity award distribution"

FAQ

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How many TWST shares is Dennis H. Cho proposing to sell?

Dennis H. Cho, an officer, reported a proposed sale of 348 common shares, with an aggregate market value of $57,591.01 and an approximate sale date of September 21, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001883451
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Twist Bioscience Corp
SEC File Number	001-38720
Address of Issuer	681 GATEWAY BLVD. SOUTH SAN FRANCISCO CALIFORNIA 94080
Phone	800-719-0671
Name of Person for Whose Account the Securities are To Be Sold	Cho Dennis
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	348	57591.01	62707424	09/21/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	09/18/2026	Restricted Stock Vesting	Issuer			348	09/18/2026	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	06/22/2026	346	30213.55
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	06/24/2026	14205	1274898.75
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	08/03/2026	1070	91293.68
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	08/05/2026	14205	1558998.75
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	08/19/2026	14205	1843098.75
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	08/21/2026	1598	222228.11
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	09/08/2026	412	50521.05

144: Remarks and Signature

Remarks	Sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution.
Date of Notice	09/21/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Dennis H. Cho
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)